The Electron Transport Chain (ETC) and oxidative phosphorylation occur in the inner mitochondrial membrane. These processes are crucial for ATP production via aerobic respiration. Oxygen acts as the final electron acceptor, and the energy from electrons is used to pump protons and generate ATP through ATP synthase.

Why not others?
– A) sER (Smooth ER): Involved in lipid metabolism and detoxification, not energy production.
– B) rER (Rough ER): Main site of protein synthesis, contains ribosomes, unrelated to ETC.
– C) Lysosome: Site of intracellular digestion, contains hydrolytic enzymes.
– D) Cytoplasm: Site of glycolysis, not oxidative phosphorylation or ETC.

Electron Transport Chain (ETC) or Respiratory Chain and Oxidative Phosphorylation occur in which part of the cell?

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